TY - GEN
T1 - Stabilization techniques for high resolution ultrasound imaging using beamspace Capon method
AU - Okumura, Shigeaki
AU - Taki, Hirofumi
AU - Sato, Toru
PY - 2015/8/4
Y1 - 2015/8/4
N2 - Several adaptive beamforming imagers have been proposed to improve the spatial resolution of medical ultrasound imaging. These imagers employ spatial averaging technique and diagonal loading technique to suppress correlated interferences and to acquire robustness, respectively. In this study, we propose the technique that selects the optimum size for spatial averaging with respect to the measurement depth. We employ a small diagonal loading factor of -40 dB to avoid the deterioration in image quality. In a simulation study, the proposed method succeeded to improve the image quality compared to a conventional beamspace Capon method. The sidelobe level and the -6 dB beam width in the proposed method were -26 dB and 0.27 mm, respectively, where those in the conventional method were -16 dB and 0.40 mm, respectively. The proposed method succeeded to depict the higher resolution image than that of the conventional method.
AB - Several adaptive beamforming imagers have been proposed to improve the spatial resolution of medical ultrasound imaging. These imagers employ spatial averaging technique and diagonal loading technique to suppress correlated interferences and to acquire robustness, respectively. In this study, we propose the technique that selects the optimum size for spatial averaging with respect to the measurement depth. We employ a small diagonal loading factor of -40 dB to avoid the deterioration in image quality. In a simulation study, the proposed method succeeded to improve the image quality compared to a conventional beamspace Capon method. The sidelobe level and the -6 dB beam width in the proposed method were -26 dB and 0.27 mm, respectively, where those in the conventional method were -16 dB and 0.40 mm, respectively. The proposed method succeeded to depict the higher resolution image than that of the conventional method.
KW - Adaptive beamforming
KW - Capon method
KW - Ultrasonography
KW - Ultrasound imaging
KW - beamspace
UR - http://www.scopus.com/inward/record.url?scp=84946066780&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84946066780&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2015.7178098
DO - 10.1109/ICASSP.2015.7178098
M3 - Conference contribution
AN - SCOPUS:84946066780
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 892
EP - 896
BT - 2015 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015
Y2 - 19 April 2014 through 24 April 2014
ER -